diff --git a/README.adoc b/README.adoc
index 8c2b3c8..88d1ab6 100644
--- a/README.adoc
+++ b/README.adoc
@@ -106,6 +106,10 @@ You can run the tests with `ctest` inside the build directory. Install with
 
 == Copyright
 
+The icons of the plugins are from the
+https://github.com/PapirusDevelopmentTeam/papirus-icon-theme[Papirus icon
+theme] with the license GPLv3.
+
 ----
 Copyright © 2019 tastytea <tastytea@tastytea.de>.
 License GPLv3: GNU GPL version 3 <https://www.gnu.org/licenses/gpl-3.0.html>.
diff --git a/browser-plugins/webextension/icon_dark.svg b/browser-plugins/webextension/icon_dark.svg
new file mode 100644
index 0000000..99621e3
--- /dev/null
+++ b/browser-plugins/webextension/icon_dark.svg
@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" version="1.1">
+ <path style="fill:#dfdfdf" d="M 4,0 C 4,0 3,0 3,1 V 15 L 8,12 13,15 V 1 C 13,1 13,0 12,0 Z M 7,3 H 9 V 5 H 11 V 7 H 9 V 9 H 7 V 7 H 5 V 5 H 7 Z"/>
+</svg>
diff --git a/browser-plugins/webextension/icon_light.svg b/browser-plugins/webextension/icon_light.svg
new file mode 100644
index 0000000..e8d7cfb
--- /dev/null
+++ b/browser-plugins/webextension/icon_light.svg
@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" version="1.1">
+ <path style="fill:#444444" d="M 4,0 C 4,0 3,0 3,1 V 15 L 8,12 13,15 V 1 C 13,1 13,0 12,0 Z M 7,3 H 9 V 5 H 11 V 7 H 9 V 9 H 7 V 7 H 5 V 5 H 7 Z"/>
+</svg>
diff --git a/browser-plugins/webextension/manifest.json b/browser-plugins/webextension/manifest.json
index f6e1184..fa2dbd7 100644
--- a/browser-plugins/webextension/manifest.json
+++ b/browser-plugins/webextension/manifest.json
@@ -1,11 +1,16 @@
 {
     "manifest_version": 2,
     "name": "remwharead",
-    "version": "0.1.2",
+    "version": "0.2.0",
 
     "description": "Integrates remwharead into your Browser.",
     "homepage_url": "https://schlomp.space/tastytea/remwharead",
 
+    "icons":
+    {
+        "16": "icon_dark.svg"
+    },
+
     "applications":
     {
         "gecko":
@@ -25,7 +30,14 @@
     {
         "default_title": "remwharead",
         "default_popup": "add_uri.html",
-        "browser_style": true
+        "browser_style": true,
+        "default_icon": "icon_dark.svg",
+        "theme_icons":
+        [{                      // Dark means dark text in Firefox. 🙄
+            "dark": "icon_light.svg",
+            "light": "icon_dark.svg",
+            "size": 16
+        }]
     },
 
     "commands":